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提出了一种可应用于毫米波功率放大器中的新型慢波结构——开敞型角向周期加载金属柱圆波导结构,并且在互作用通道内,引入了薄环形电子注,推导出了此时的“热”色散方程,并且对基于该新型慢波结构的行波管的小信号增益特性进行了深入探讨.通过数值方法研究了金属柱尺寸和电子注参数对器件线性特性的影响.结果表明:通过对金属柱尺寸的适当设计,可以获得更高的增益值.与封闭型结构的比较结果表明,开敞型角向周期加载金属柱圆波导结构能够有效地提高小信号增益,并且对带宽的影响不大.研究结果为研制基于此新型慢波系统的毫米波行波管奠定了理论基础.
A new type of slow-wave structure, which is applied to the millimeter-wave power amplifier, is proposed, which is an open-angle periodically loaded metal-column circular waveguide structure. In the interaction channel, a thin ring electron injection is introduced. The thermal dispersion equation is also discussed in detail, and the small-signal gain characteristics of the traveling-wave tube based on this new type of slow-wave structure are discussed in detail. The influence of the size of the metal column and the parameters of the electron injection on the linear characteristics of the device is investigated numerically The results show that the higher gain can be obtained by properly designing the size of the metal pillar.Compared with the closed structure, the results show that the opening angle of the circularly charged metal circular waveguide structure can effectively improve the small signal gain, And has little effect on the bandwidth.The research results have laid a theoretical foundation for the development of millimeter-wave traveling wave tube based on this new type of slow-wave system.